Image forming apparatus and toner cartridge

An image forming apparatus comprising:

• a printing assembly configured to receive a toner cartridge that stores toner, the printing assembly including a motor configured to facilitate discharging the toner from the toner cartridge;
• a reader positioned to read information from a storage unit of the toner cartridge, the information including a correction coefficient based on an additive in the toner and an integrated counter indicative of a stored amount of the toner in the toner cartridge;
• and
• a control unit configured to:
• receive an input to print an image;
• acquire the information from the toner cartridge;
• operate the motor for a run time based on the input to discharge an amount of the toner to facilitate forming the image;
• and
• estimate a remaining amount of the toner stored in the toner cartridge based on the integrated counter, the correction coefficient, and the run time.

An image forming apparatus comprising:

• a printing assembly configured to receive a toner cartridge that stores toner, the printing assembly including a motor configured to facilitate discharging the toner from the toner cartridge;
• a reader positioned to read information from a storage unit of the toner cartridge, the information including a correction coefficient based on an additive in the toner and an integrated counter indicative of a stored amount of the toner in the toner cartridge;
• and
• a control unit configured to:
• receive an input to print an image;
• acquire the information from the toner cartridge;
• determine a run time of the motor for discharging an amount of the toner necessary for forming the image;
• determine a corrected run time based on a product of the run time and the correction coefficient;
• operate the motor for the corrected run time to discharge the amount of the toner necessary for forming the image;
• and
• estimate a remaining amount of the toner stored in the toner cartridge based on the integrated counter and corrected run time.